阅读说明：本技术 一种隧道爆破的复合隔震结构 (Composite shock insulation structure for tunnel blasting ) 是由 周晗赟 曹靖 孟祥宇 吴桐 程佳佳 梅顶 陈明 柳晋楠 刘盛盛 蔡觉毅 于 2021-08-10 设计创作，主要内容包括：本发明涉及一种隧道爆破的复合隔震结构,包括位于新建隧道和原有隧道之间的减震沟,所述减震沟沿上下方向延伸,所述新建隧道和原有隧道之间还设有两个减震孔群,两个所述减震孔群分布在减震沟的水平方向的两侧,所述减震孔群包括至少两排减震孔排,同一排减震孔排中的减震孔沿上下方向分布,减震孔排沿左右方向分布,相邻两排减震孔排中的减震孔沿上下方向错开。本发明旨在提供一种能够起到加固隧道粉刷层作用的隧道爆破的复合隔震结构,用于新建隧道施工时对现有隧道入口处进行防护。(The invention relates to a composite shock insulation structure for tunnel blasting, which comprises a shock absorption ditch between a newly-built tunnel and an original tunnel, wherein the shock absorption ditch extends along the vertical direction, two shock absorption hole groups are arranged between the newly-built tunnel and the original tunnel and distributed on two sides of the shock absorption ditch in the horizontal direction, each shock absorption hole group comprises at least two rows of shock absorption hole rows, shock absorption holes in the same row of shock absorption hole rows are distributed along the vertical direction, the shock absorption hole rows are distributed along the left-right direction, and shock absorption holes in the two adjacent rows of shock absorption hole rows are staggered along the vertical direction. The invention aims to provide a tunnel blasting composite shock insulation structure capable of playing a role of reinforcing a tunnel painting layer, which is used for protecting an existing tunnel entrance when a new tunnel is constructed.)

1. The utility model provides a compound shock insulation structure of tunnel blasting, its characterized in that, is including being located the shock attenuation ditch between newly-built tunnel and the original tunnel, the shock attenuation ditch extends along upper and lower direction, still be equipped with two shock attenuation hole crowd, two between newly-built tunnel and the original tunnel shock attenuation hole crowd distributes in the both sides of the horizontal direction of shock attenuation ditch, the shock attenuation hole crowd includes that two row at least shock attenuation hole arrange, and the shock attenuation hole that same row of shock attenuation hole arranged distributes along upper and lower direction, and the shock attenuation hole is arranged along controlling the direction and is distributed, and the shock attenuation hole that two rows of adjacent shock attenuation hole arrange staggers along upper and lower direction.

2. The composite shock insulation structure for tunnel blasting according to claim 1, further comprising a recycling shock insulation frame, wherein the recycling shock insulation frame comprises an annular metal bottom plate supported on the mountain surface between the newly-built tunnel and the original tunnel, a metal panel connected with the annular metal bottom plate through a metal cylinder, a rubber bag connected with the annular metal bottom plate and arranged in the shock absorption ditch, and a plurality of rubber blind pipes connected with the annular metal bottom plate and arranged in the shock absorption holes in a one-to-one correspondence manner, the annular metal plate extends along the circumferential direction of the opening end of the rubber bag and is in sealing butt joint with the opening pair of the rubber bag, the metal panel, the metal cylinder, the annular metal bottom plate and the rubber bag enclose a first air cavity, the metal panel is provided with a pressure limiting valve for limiting the pressure in the first air cavity, the annular metal bottom plate is provided with a plurality of air holes communicated with the first air cavity, the open ends of the rubber tubes are in one-to-one correspondence with the air holes in a sealing and butt joint mode, so that the rubber blind tubes are communicated with the first air cavity, and the air pressure in the first air cavity is higher than 7 standard atmospheric pressures.

3. The composite shock insulation structure for tunnel blasting according to claim 2, wherein the opening area of the rubber bag is smaller than the opening area of the annular metal base plate, the opening shape of the rubber bag is similar to the opening shape of the annular metal base plate, the opening end of the rubber bag is arranged in the annular metal base plate in a penetrating mode and provided with a flanging overlapped on the front side surface of the annular metal base plate, and the flanging and the opening end of the rubber bag are fixedly connected with the annular metal base plate in a sealing mode.

4. A composite seismic isolation structure for tunnel blasting according to claim 2 or 3, wherein sand is filled in the damping trench, and the rubber bag blocks the opening end of the damping trench to prevent the sand from falling out of the damping trench.

5. The composite shock insulation structure for tunnel blasting according to claim 2 or 3, wherein the metal cylinder exceeds the metal panel to form a cylinder body section, a friction energy dissipation plate is connected in the cylinder body section in a sliding mode, and the friction energy dissipation plate is connected with the metal panel through a shock absorption tension spring.

6. The composite seismic isolation structure for tunnel blasting according to claim 5, wherein the metal panel is provided with panel part sliding pipes, and the friction energy dissipation plate is provided with energy dissipation panel part sliding pipes; the energy dissipation plate part sliding pipe and the panel part sliding pipe are arranged, and one sliding sealing sleeve is arranged outside the other sliding sealing sleeve; the friction energy dissipation plate, the energy dissipation plate part sliding pipe, the panel part sliding pipe and the metal panel enclose a second air cavity, and the pressure limiting valve is located in the second air cavity.

7. The composite shock insulation structure for tunnel blasting according to claim 6, wherein the panel part sliding pipe penetrates through the metal panel and then penetrates into the rubber bag, and the shock absorbing tension spring is located in the second air cavity.

8. The composite seismic isolation structure for tunnel blasting according to claim 6, wherein the second air chamber is provided with a pressure relief valve on the friction energy dissipation plate.

9. The composite seismic isolation structure for tunnel blasting according to claim 5, wherein a cylinder friction layer is provided on an inner peripheral surface of the cylinder section, and an energy dissipation plate friction layer is provided on an outer peripheral surface of the friction energy dissipation plate, and the friction energy dissipation plates are slidably connected together by abutting the energy dissipation plate friction layer against the cylinder friction layer.

10. The composite seismic isolation structure for tunnel blasting according to claim 1, 2 or 3, wherein the first air chamber is provided with an inflation valve on the metal cylinder.

Technical Field

The invention belongs to the technical field of engineering construction, and particularly relates to a composite shock insulation structure for tunnel blasting.

Background

With the continuous improvement of road traffic systems, the range of road engineering is gradually increased, tunnel engineering is an important part in traffic construction, and in order to promote the comprehensive three-dimensional traffic development of the economic zone of the Yangtze river, strengthen the road system and optimize resource allocation, in mountainous regions, the excavation and blasting of mountain tunnels are indispensable, and how to reduce the influence on the conventional buildings or the conventional tunnel traffic process is always a key concern. In the process of traffic through the existing tunnel, a new tunnel is developed beside the existing tunnel, if the new tunnel is exploded, the problem of traffic through the existing tunnel is definitely caused, the safe driving of vehicle personnel is influenced, and the problem of reducing the influence caused by blast waves is solved. Particularly, at the end opening part of the newly built tunnel at the beginning of building, shock insulation is not carried out, and the damage and the falling of the painting surface layer at the tunnel opening of the existing tunnel are easily caused.

Disclosure of Invention

The invention aims to provide a tunnel blasting composite shock insulation structure capable of playing a role of reinforcing a tunnel painting layer, which is used for protecting an existing tunnel entrance when a new tunnel is constructed.

The above problems are solved by the following technical solutions: the utility model provides a compound shock insulation structure of tunnel blasting, is including being located newly-built tunnel and the shock attenuation ditch between the original tunnel, the shock attenuation ditch extends along upper and lower direction, still be equipped with two shock attenuation hole crowd, two between newly-built tunnel and the original tunnel shock attenuation hole crowd distributes in the both sides of the horizontal direction of shock attenuation ditch, the shock attenuation hole crowd includes two row at least shock attenuation hole rows, and the shock attenuation hole that same row of shock attenuation hole row was arranged distributes along upper and lower direction, and the shock attenuation hole row distributes along left and right directions, and the shock attenuation hole that two rows of adjacent shock attenuation hole rows were arranged staggers along upper and lower direction. According to the invention, the shock absorption grooves and the shock absorption holes are arranged at the part of the tunnel portal between the new tunnel and the old tunnel, so that the effect of protecting the mountain body at the tunnel portal can be achieved, and the mountain body at the tunnel portal is prevented from falling off and sliding on the slope during blasting; when the mountain surface of the tunnel portal is painted, cement is filled in the pouring hole and the damping ditch, and the effect of improving the connection effect of the painting layer is achieved. The shock attenuation ditch department can fill the concrete and form the clipboard for writing characters such as tunnel name usefulness to solve current direct one deck cement of scribbling on mountain surface and write and produce the problem that drops easily.

The invention also comprises a recycling type shock insulation frame, wherein the recycling type shock insulation frame comprises an annular metal bottom plate supported on the surface of a mountain between a newly-built tunnel and an original tunnel, a metal panel connected with the annular metal bottom plate through a metal cylinder, a rubber bag connected with the annular metal bottom plate and arranged in a shock absorption groove in a penetrating mode, and a plurality of rubber blind pipes connected with the annular metal bottom plate and arranged in the shock absorption holes in a penetrating mode in a one-to-one correspondence mode, the annular metal plate extends along the circumferential direction of the opening end of the rubber bag and is in butt joint with the opening pair of the rubber bag in a sealing mode, the metal panel, the metal cylinder, the annular metal bottom plate and the rubber bag enclose a first air cavity, a pressure limiting valve for limiting the pressure in the first air cavity is arranged on the metal panel, a plurality of air holes communicated with the first air cavity are arranged on the annular metal bottom plate, the opening ends of the rubber pipes are in butt joint with the air holes in a one-to-one correspondence mode, and the rubber blind pipes and the first air cavity are sealed together And the air pressure in the first air cavity is more than 7 standard atmospheric pressures. The impact force generated by explosion extrudes the rubber bag and the rubber tube to be absorbed, the absorption result is that the air pressure in the first air cavity rises, and when the air pressure rises to the set pressure limiting valve, the pressure relief has the function of shock absorption. The contact of mountain body is annular metal sheet, and the recoil force that produces is difficult to lead to the damage during the pressure release, and fail safe nature is good. After the construction of one place is finished, the gas in the first gas cavity is discharged, so that the cyclic utilization type shock insulation frame can be conveniently folded. The first air cavity can be reused after being aerated when construction is carried out at the next construction site.

Preferably, the opening area of the rubber bag is smaller than that of the annular metal bottom plate, the opening shape of the rubber bag is similar to that of the annular metal bottom plate, the opening end of the rubber bag is arranged in the annular metal bottom plate in a penetrating mode and provided with an outward flange overlapped on the front side surface of the annular metal bottom plate, and the outward flange and the opening end of the rubber bag are fixedly connected with the annular metal bottom plate in a sealing mode. The force that can make the inside atmospheric pressure that produces when the rubber bag receives blast wave shock contraction rise can not lead to droing between rubber bag and the annular metal bottom plate, can play the effect that improves the connection effect of this department moreover.

Preferably, the damping ditch is filled with sand, and the rubber bag blocks the opening end of the damping ditch to prevent the sand from falling out of the damping ditch. Fill husky, can improve the shock attenuation effect, use when husky can supply to whitewash fitment tunnel portal moreover. Since the damping trench is on the vertical wall, the structure solves the problem that sand can fall.

Preferably, the metal cylinder exceeds the metal panel to form a cylinder body section, a friction energy dissipation plate is connected in the cylinder body section in a sliding mode, and the friction energy dissipation plate is connected with the metal panel through a shock absorption tension spring. After the pressure limiting valve is opened, the air flow can cause the name energy dissipation plate to move, the vibration absorption tension spring deforms to dissipate energy as a result of the movement, and the friction energy dissipation plate and the cylinder body section dissipate energy through friction.

Preferably, the metal panel is provided with a panel part sliding pipe, and the friction energy dissipation plate is provided with an energy dissipation plate part sliding pipe; the energy dissipation plate part sliding pipe and the panel part sliding pipe are arranged, and one sliding sealing sleeve is arranged outside the other sliding sealing sleeve; the friction energy dissipation plate, the energy dissipation plate part sliding pipe, the panel part sliding pipe and the metal panel enclose a second air cavity, and the pressure limiting valve is located in the second air cavity. Because friction energy dissipation is needed between the friction energy dissipation plate and the cylinder body section, air leakage can be generated between the friction energy dissipation plate and the cylinder body section, and the energy dissipation effect generated after the pressure limiting valve is opened can be poor due to the generation of the air leakage. The technical scheme solves the problem.

Preferably, the panel part sliding pipe penetrates through the metal panel and then penetrates into the rubber bag, and the shock-absorbing tension spring is located in the second air cavity. The installation of big shock absorption extension spring can be realized under the prerequisite of compact structure.

Preferably, the second air chamber is provided with a pressure relief valve located on the friction energy dissipating plate. The friction energy dissipation plate and the shock absorption tension spring can be conveniently reset.

Preferably, a cylinder friction layer is provided on an inner circumferential surface of the cylinder block, a friction layer for dissipating energy is provided on an outer circumferential surface of the friction energy dissipation plate, and the friction energy dissipation plates are slidably connected to each other by abutting the friction layer for dissipating energy from the friction layer. The friction energy dissipation effect between friction energy dissipation board and the body of rod section can be improved.

Preferably, the first air cavity is provided with an inflation valve positioned on the metal tube. After the use is convenient, the inflation reset is carried out.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the shock absorption grooves and the shock absorption holes are arranged at the part of the tunnel portal between the new tunnel and the old tunnel, so that the effect of protecting the mountain body at the tunnel portal can be achieved, and the mountain body at the tunnel portal is prevented from falling off and sliding on the slope during blasting; when the mountain surface of the tunnel portal is painted, cement is filled in the pouring hole and the damping ditch, and the effect of improving the connection effect of the painting layer is achieved. Concrete can be filled in the damping groove to form a writing board for writing characters such as tunnel names and the like, so that the problem that the existing method for directly coating a layer of cement on the surface of the mountain body to write easily falls off is solved; the shock absorption holes in adjacent rows in the multiple rows of shock absorption holes are staggered, so that the integrity of the explosion area is weakened, and the influence of explosion waves can be weakened at a position close to a source; the shock absorption holes are arranged between the two tunnels, and the shock absorption holes are more than one row, so that the propagation path of the explosion wave is changed layer by layer in the wave propagation process, the impact power of the explosion wave is gradually weakened, the influence on the existing traffic tunnel in the blasting process is reduced, and a good shock absorption and buffering effect is achieved.

Drawings

FIG. 1 is a schematic front view of a first embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a second embodiment of the present invention, as viewed in cross-section through a horizontal plane along the direction in which the tunnel extends;

fig. 3 is a partially enlarged schematic view of a portion a of fig. 2.

In the figure: the novel tunnel comprises a newly-built tunnel 1, an original tunnel 2, a damping ditch 3, a damping hole 4, a mountain surface 5 between the newly-built tunnel and the original tunnel, an annular metal bottom plate 6, a metal cylinder 7, a metal panel 8, a rubber bag 9, a rubber blind pipe 10, a first air cavity 11, a pressure limiting valve 12, a flanging 13, sand 14, a cylinder body section 15, a friction energy dissipation plate 16, a shock absorption tension spring 17, a panel part sliding pipe 18, an energy dissipation plate part sliding pipe 19, a second air cavity 20, a pressure release valve 21, a cylinder body part friction layer 22, an energy dissipation plate part friction layer 23 and an inflation valve 24.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the first embodiment, referring to fig. 1, a composite shock insulation structure for tunnel blasting includes a shock absorption trench 3 located between a new tunnel 1 and an original tunnel 2, the shock absorption trench extends in the up-down direction, two shock absorption hole groups are further arranged between the new tunnel and the original tunnel, the two shock absorption hole groups are distributed on two sides of the horizontal direction of the shock absorption trench, each shock absorption hole group includes at least two rows of shock absorption hole rows, shock absorption holes 4 in the same row of shock absorption hole rows are distributed in the up-down direction, the shock absorption hole rows are distributed in the left-right direction, and shock absorption holes in two adjacent rows of shock absorption hole rows are staggered in the up-down direction. After blasting is finished, when a concrete layer is brushed on the mountain surface 5 between the newly-built tunnel and the original tunnel to level and reinforce the mark of the tunnel hole, the concrete is filled in the damping hole and the damping ditch to form the reinforcing foot effect of the crushing layer.

The second embodiment is different from the first embodiment in that:

referring to fig. 2, the shock insulation structure comprises a cyclic utilization type shock insulation frame, wherein the cyclic utilization type shock insulation frame comprises an annular metal bottom plate 6, a metal panel 8, a rubber bag 9 and a plurality of rubber blind pipes 10, the annular metal bottom plate is supported on the surface of a mountain between a newly-built tunnel and an original tunnel, the metal panel 8 is connected with the annular metal bottom plate through a metal cylinder 7, the rubber bag 9 is connected to the annular metal bottom plate and penetrates through a shock absorption groove, and the rubber blind pipes are connected to the annular metal bottom plate and penetrate through the shock absorption holes in a one-to-one correspondence mode. The annular metal plate extends along the circumferential direction of the opening end of the rubber bag and is in sealing butt joint with the opening pair of the rubber bag. The metal panel, the metal tube, the annular metal bottom plate and the rubber bag are enclosed to form a first air cavity 11, the metal panel is provided with a pressure limiting valve 12 for limiting the pressure in the first air cavity, the annular metal bottom plate is provided with a plurality of air holes communicated with the first air cavity, the open ends of the rubber tubes are in one-to-one butt joint with the air holes in a sealing mode to enable the rubber blind tubes to be communicated with the first air cavity, and the air pressure in the first air cavity is more than 7 standard atmospheric pressures. The opening area of the rubber bag is smaller than that of the annular metal base plate, the opening shape of the rubber bag is similar to that of the annular metal base plate, the opening end of the rubber bag is arranged in the annular metal base plate in a penetrating mode and provided with a flanging 13 overlapped on the front side surface of the annular metal base plate, and the flanging and the opening end of the rubber bag are fixedly connected with the annular metal base plate in a sealing mode. The damping ditch is filled with sand 14, and the rubber bag is blocked at the opening end of the damping ditch to prevent the sand from falling out of the damping ditch. The metal cylinder exceeds the metal panel to form a cylinder body section 15, a friction energy dissipation plate 16 is connected in the cylinder body section in a sliding mode, and the friction energy dissipation plate is connected with the metal panel through a shock absorption tension spring 17. The metal panel is provided with a panel part sliding pipe 18, and the friction energy dissipation plate is provided with an energy dissipation plate part sliding pipe 19; the energy dissipation plate sliding pipe is slidably arranged in the panel sliding pipe in a penetrating way; the friction energy dissipation plate, the energy dissipation plate part sliding pipe, the panel part sliding pipe and the metal panel enclose a second air cavity 20, and the pressure limiting valve is located in the second air cavity. The panel part sliding pipe penetrates through the metal panel and then is arranged in the rubber bag in a penetrating mode, and the shock absorption tension spring is located in the second air cavity. The second air chamber is provided with a pressure relief valve 21 located on the friction energy dissipating plate. The inner circumferential surface of the cylinder body section is provided with a cylinder body friction layer 22, the outer circumferential surface of the friction energy dissipation plate is provided with an energy dissipation plate friction layer 23, and the friction energy dissipation plates are connected together in a sliding manner by abutting against the cylinder body friction layer through the energy dissipation plate friction layer. The first air chamber is provided with an inflation valve 24 located on the canister.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles of the invention, the scope of which is defined in the appended claims and their equivalents.